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  • Bubble Bobble EditI thought I might have a go at editing Bubble Bobble myself after reading this... [url]http://www.worldofspectrum.org/forums/showthread.php?t=15452[…

    ... positions actually lie on a screen and when you need to ... consider adding 2 and 4 (set bits 1+2) onto that ... or something. So the 69 above change to 6B first, watch ...
    mulder mulder April 2007 Development
  • Reason for strange display layout?I have always wondered if there is any technical reason behind the strange layout of the display file or why did Sinclair choose to do it this way?

    ... character set.
    2. Write byte to screen.
    3. Increase screen pointer ... line where the next pixel is the next screen row below this ... work out where the next pixel shoudl be in the frame ...
    Winston Winston April 2007 Development
  • Reason for strange display layout?I have always wondered if there is any technical reason behind the strange layout of the display file or why did Sinclair choose to do it this way?

    ... /64 = 25.7 cycles. The above would change a little bit ... work with the main register set, perhaps with BC=source (inlined ... layout for both its 6k pixel area and the 6k attr ...
    obo obo May 2007 Development
  • Image adviceAt the moment I am looking at the image conversion tools available on wos. With this in mind i have converted a jpg to spectrum format. Original im…

    ... really mono with a 8x8 pixel colour oveerlay.

    This ... one of the speccy pc screen utilities.

    This way ... /> Would anyone dissagree with the above?
    Toxitalk Toxitalk May 2007 Sinclair Basic
  • Converting m$ to dataI created a maze using a matrix of 704 characters. In order to save memory, and since the maze it's just walls and spaces which could be interpreted …

    ... RESTORE function that packs your screen into 88 bytes (stored at ... /> Damn, sorry zxbruno, my "snapshot" above was another link to the ... RANDOMIZE USR 60037
    To set the "wall" colour, POKE 65075 ... , colour
    To set the "path" colour, POKE 65076 ...
    BloodBaz BloodBaz May 2007 Sinclair Basic
  • Faster Pussycat, yer man (UDG)Right we are almost into a game area. Ive started to play with UDG and by using bins and pokes I can redesign graphics to my hearts content. Now Im…

    ... way too slow. The screens pixel area starts at 16384, and ... /> I know I can set the screen display as 'scan lines' but ...
    Toxitalk Toxitalk May 2007 Sinclair Basic
  • Faster Pussycat, yer man (UDG)Right we are almost into a game area. Ive started to play with UDG and by using bins and pokes I can redesign graphics to my hearts content. Now Im…

    ... characters in the ZX81 character set.
    So you ... an "X" immediately on the screen.

    The ... the ZX Spectrum character set when you do a ... characters onto the text screen, or pixel cells onto the ... Hi-res screen.

    The ...
    hldswrth hldswrth May 2007 Sinclair Basic
  • How does interrupts work?I am a little confused regarding the interrupts on the Spectrum. If I have some hundred bytes of machine code started with, say, [B]RANDOMIZE USR 300…

    ... TOP part of the border (above the screen) by:

    set up Interrupt Mode 2 ... has started drawing the screen proper. Watch out ... attribute buffers to draw the screen).

    4 ... be updated before the main screen is encroached.
    < ...
    BloodBaz BloodBaz May 2007 Development
  • How does interrupts work?I am a little confused regarding the interrupts on the Spectrum. If I have some hundred bytes of machine code started with, say, [B]RANDOMIZE USR 300…

    ... of the screen? And during some short moments it is above or ... below the actual Spectrum screen (in the ... be printed on the tv screen?

    Regarding flickering, do ... the sprite (for example one pixel to the right) and just ...
    Rickard Rickard May 2007 Development
  • Project: M.u.l.e.Wokani came up with a great idea about trying an open-development approach for spectrum games, and I thought why not try with a game I have under dev…

    ... the spectrum's character set. So in this C ... of the spectrum's character set. The type declared for ... location of the character set. On returning to basic ... render to the screen one complete pixel row by writing ... the spectrum's character set. By adding 8 times ...
    Alcoholics Anonymous Alcoholics Anonymous June 2007 Development
  • ANN: SP1 for Z88DK (aka splib3, Sprite Pack v3.0)Well it's finally arrived, after a month of "a few days from now" release deadlines. SP1 is the lastest version of splib, a flicker-free software sp…

    ... br />
    sp1_UpdateNow(); // draw screen now

    for (i ... />
    ;GRAPHIC DATA:
    ;Pixel Size: ( 16, 24)
    ;Char ... this case, in the calls above, the sp1_CreateSpr() and sp1_AddColSpr() ...
    Alcoholics Anonymous Alcoholics Anonymous July 2007 Development
  • Preferred way of determining Y co-ord in assembly?I know of 2 ways of calculating the y-cord of a pixel row for the speccy in assembly. One is to calculate the address by ways of shifting and masking…

    ... calculating the screenaddres to a pixel.
    When I lower 1 ... pixel I test if it's ... .

    In a 8 pixel line it is calculated twice ... b,Y-COOR ; I set start left above, not left below!
    Dr BEEP Dr BEEP July 2007 Development
  • Project: M.u.l.e.Wokani came up with a great idea about trying an open-development approach for spectrum games, and I thought why not try with a game I have under dev…

    ... call zx_cyxsaddr_callee + ASMDISP_ZX_CYX2SADDR_CALLEE
    ;; hl = screen address
    [/code]

    pixel row, I think you ... djnz). LDI happens to set the parity flag when ... br />
    scroll_isr() is set up to scroll the message ...
    Alcoholics Anonymous Alcoholics Anonymous July 2007 Development
  • Poorly Spectrum + Fault diagnosis help needed!Hi, I've got a Spectrum+. Sometime in the past I broke it and sent it off to be fixed. It came back working good as new, but with an issue 2 board i…

    ... /> Apart from the issue mentioned above, I'd like to ask ... obtained from the messed up screen of a borked spectrum? I ... with the bright attribute apparently set) is a good sign that ...
    Winston Winston July 2007 Hardware
  • Poorly Spectrum + Fault diagnosis help needed!Hi, I've got a Spectrum+. Sometime in the past I broke it and sent it off to be fixed. It came back working good as new, but with an issue 2 board i…

    ... from the issue mentioned above, I'd like to ask ... from the messed up screen of a borked spectrum? ... people post asking "my screen looks like......, what's ... you see on the screen, the system variables and ... set and reset bits, and this can be seen on screen ...
    DEATH DEATH July 2007 Hardware
  • Project: M.u.l.e.Wokani came up with a great idea about trying an open-development approach for spectrum games, and I thought why not try with a game I have under dev…

    ... . These are the first set of routines I wrote and ... it for the next set of tasks (which will ... gotten far enough to set up a memory map ... to be scrolled across the screen. The second function "u_AppendLong" ... kroah's document and listed above.

    For ...
    Alcoholics Anonymous Alcoholics Anonymous July 2007 Development
  • Project: M.u.l.e.Wokani came up with a great idea about trying an open-development approach for spectrum games, and I thought why not try with a game I have under dev…

    ... Eg, one such computation above is "heads/1000.0 ... two such specifiers used above that mean "print ... above is how we can print a single "%" sign to the screen ... {
    clg(); // clear pixel portion of screen

    // ...
    Alcoholics Anonymous Alcoholics Anonymous July 2007 Development
  • Collision detectionI understand the basic methods for testing for collisions but I have question about the trickier situation of testing for when shots hit the backgrou…

    ... than collision detecting against the screen, try testing against the X ... frame, Last address rendered to screen and attribute area, etc)
    pixel collision

    Once you ... be able to write the above code in a few hours ...
    BloodBaz BloodBaz July 2007 Development
  • Need advice buying an LCD monitorI want to buy an LCD monitor for my desktop PC, so what should I look out for or avoid? I don't need anything special (I only use the PC for internet…

    ... first time.

    The screen somehow also seems bigger than ... some spare and so I set it up for DVI.
    above monitor. Things normally go down ...
    Digital Prawn Digital Prawn July 2007 Chit chat
  • Remade Speccy game. Chaos.I'm not sure if I'm posting this in the right place. But if I write Speccy and games then I'm sure it is now! Anyways... Just in case some people …

    ... /> When you have winUAE set up , and the above configuration loaded, you ... at the top of the screen (Accessed with the right mouse ... amiga desktop.

    The above configuration is by no means ... experts could add to the above, or maybe refine the ...
    Digital Prawn Digital Prawn August 2007 Games
  • how is real spectrum used?I have just downloaded real spectrum for use on my win XP. I have read the info but still have got problems. 1) If I remove the 128k rom there is a…

    ... tips. Loaded game and made screen slightly larger.

    The screen is still a fraction of ... the laptop screen size. Is there any ... has the display problem above the hall of fame, ... load when spectaculator is set to 48k Spectrum mode ...
    naz2000007 naz2000007 August 2007 Emulators
  • Project: M.u.l.e.Wokani came up with a great idea about trying an open-development approach for spectrum games, and I thought why not try with a game I have under dev…

    ... ; // MTN_*
    uchar x_offset; // horizontal pixel offset within plot

    set all struct plots to have ... helper function, place_crystite(), is defined above p_GenerateMap():

    [code]< ...
    Alcoholics Anonymous Alcoholics Anonymous August 2007 Development
  • Project: M.u.l.e.Wokani came up with a great idea about trying an open-development approach for spectrum games, and I thought why not try with a game I have under dev…

    ... // MTN_*
    uchar x_offset; // horizontal pixel offset within plot

    [code]
    // bit 5 = set plot to player colour

    aaddr = zx_saddr2aaddr(u->screen); // get attr address for this ...
    Alcoholics Anonymous Alcoholics Anonymous September 2007 Development
  • Contention and floating bus timingHello, I was recently playing a bit with memory contention and floating bus stuff in ZXDS and there is one thing which puzzles me a bit. It is the d…

    ... />
    I get a screen of coloured squares, a magenta ... and then a black screen with a nice yellow ... = 1 contented T-state before pixel output.

    Which ... must be correct for the above to hold true.
    ... a nice proof for the above. I will have to ...
    csmith csmith September 2007 Emulators
  • Project: M.u.l.e.Wokani came up with a great idea about trying an open-development approach for spectrum games, and I thought why not try with a game I have under dev…

    ... display the sprite on screen because of how the ... br />
    In the above code fragment sp1_IterateSprChar() calls our ... In this colour_sprite() function we set the colour to "g_uchar0" consisting ... gfx_playerColour[] array, and we set the attribute mask to ...
    Alcoholics Anonymous Alcoholics Anonymous September 2007 Development
  • What did Spectrum BASIC lack (and was BBC BASIC so good?)Over the years, I've read in various multi-format magazines, that BBC BASIC was probably the best BASIC available on an 8-bit machine. I've never use…

    ... the screen. The default origin would be 0,0, just above the ... input area. If you set YOS to the ...
    zub zub September 2007 Sinclair Basic
  • MULTITECH pictures[url]http://velesoft.speccy.cz/data-gear.htm[/url]

    ... the user how DMA is set-up.

    [quote ... Would you say that full screen multicolor can be done ... driver that moves data to screen in [B]32 bytes ... you can move full screen in less than 1/ ... idea immediately. As I wrote above, DMA is easiest / cheapest ...
    omega omega October 2007 Hardware
  • Project: M.u.l.e.Wokani came up with a great idea about trying an open-development approach for spectrum games, and I thought why not try with a game I have under dev…

    ... his turn after the plot screen has been drawn to determine ... colony's land plots on screen with player's plots flashing ... it that is run to set up the appropriate text message ... first place player code discussed above had the total number of ...
    Alcoholics Anonymous Alcoholics Anonymous October 2007 Development
  • Poke 23739,111So, I'm looking at some of my old loaders (BASIC stuff) to work out how I got the display to not corrupt on loading code. It's the old POKE 23739,111…

    ... and BASIC, so the details above may be wrong... but it ... . You'll probably have to set it back to 83 once ... program has loaded or the screen might start to do some ...
    jonathan jonathan October 2007 Sinclair Basic
  • Digitized videos and sounds projectAfter starting this thread [url]http://www.worldofspectrum.org/forums/showthread.php?t=14420[/url] I decided to start converting parts of clips and…

    ... you are als able to set the start- and end frame ... possibility to display a zoomed screen on right click, with ... Instead of saving the converted screen to hd immediately after conversion ... to 1280x1024 pixel and convert them to same sized screen (which cannot ...
    LCD LCD October 2007 Sinclair Miscellaneous
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